Subtract 18/40 from 8/10
8/10 - 18/40 is 7/20.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 10 and 40 is 40
Next, find the equivalent fraction of both fractional numbers with denominator 40 - For the 1st fraction, since 10 × 4 = 40,
8/10 = 8 × 4/10 × 4 = 32/40 - Likewise, for the 2nd fraction, since 40 × 1 = 40,
18/40 = 18 × 1/40 × 1 = 18/40 - Subtract the two like fractions:
32/40 - 18/40 = 32 - 18/40 = 14/40 - After reducing the fraction, the answer is 7/20
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/10-18/40 8/10-36/40 8/20-18/40 8/10-18/80 24/10-18/40 8/10-54/40 8/30-18/40 40/10-18/40 8/10-90/40 8/50-18/40 56/10-18/40 8/70-18/40